If you buy the kit, it comes with this bracket. The reason I had discussed an extra device is because the kit only comes with one of these to connect it to your bike, and I was keeping it :).
Just found this!
Garmin Bike mount, quick release, quarter turn https://www.amazon.com/dp/B002NU6J1Y
Thanks for idea, thats a pretty solid idea.
I just found found this and think I’m going to use this method.
Garmin Bike mount, quick release, quarter turn https://www.amazon.com/dp/B002NU6J1Y
For years I have only used Garmin https://www.amazon.de/Garmin-Zubeh%C3%B6r-Edge-Fahrradhalterung-010-11430-00/dp/B002NU6J1Y
Yes... found this on amazon: https://www.amazon.com/gp/product/B002NU6J1Y/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
Just the elastic one that's generally intended for a stem or handlebar should work on a top tube. Such as: https://www.amazon.ca/Garmin-mount-quick-release-quarter/dp/B002NU6J1Y
The one it comes with works fine for me. I have it in my MTB, and one of the out front ones on my cyclocross bike.